Fluid motor



B. HEFTYE FLUID MOTOR May 26, 1936.

3 Sheets-Sheet 1 Original Filed March 20, 1935 Inventor ZZZZZZ, t:

B. HEFTYE FLUID MOTOR May 26, 1936;

3 Sheets-Sheet 2 Original Filed March 20, 1935 I n van [or w my m A K Div M 2 W .F M

\T v EZ 52 L; 4

May 26, 1936.

B. HEFTYE FLUID MOTOR Original Filed March 20, 1935 3 Sheets-Sheet 3 Inventor Patented-M 2c, 1936' UNITED: sTATEs- PATENT OFFICE [B n -122 :1321, Mex.

Original application March 20, 1935, Serial N'...

12,098. Divided and this application June 3,

- j 193$?Serlal No. 24,724

, This invention relates to a fluid motor for pumps. the general object of the invention bein to provide a motor operated by fluid and in such a manner that it is entirely automatic and one which can be used in a well for operating a pump piston which is used to. lift liquid from thewell.

The present invention is adivision of application Serial No. 12,098 flied by me on March 2 0,

This invention alsofconslsts incertain other .features of construction and in the combination and arrangement of several parts, to be hereinafter fully described, illustrated in the accompanying drawings'and specifically pointed a 5 out inthe appended claims.

In describingthe invention detail, reference will be had to the accompanying drawings wherein like characters denote'l'ike 91- corresponding partsthroughout the several views, and in go which:-

Figure 1 is a vertical sectional view through a well casing showing the motor in use therein for operating a pump piston. I I

- Figure 2 is a longitudinal sectional view through as that part of the casing which contains the motor -.with parts of the motor in section, this view showing the piston of the motor in an intermediate position. -Figure3 is asimil arview but showing the is- 80 tonin its upper position. Figure 4 is a view similar toFigure3 takena quarter turn therefrom.

Figure 5 is a longitudinal sectional view through the upper portion of the casing shown 85 in'Figure 1.

Figure 6'is. a section on the-line 6-6 Figure 5.

Figure 7 is a section on ftheiine 'I-l of Figure Figure 8 is a section on the lineB-B of Figure Figure 9 is a. section 'on the line 9-9 or Fig- Figure 19-is a view of the two tubular valve 45 members, Figure 11 is .a longitudinal sectional view.

through the upper end oi, .the discharge pipe.

- Figurelz is a'view of one ofthespring com-' pressing members. Figure 13 is a view or one oi. the latchimemwell casing which is formed of a-plurality ofsections threadedly connected together, the low- I these drawings, the letter A indicates the ing'the fluid to a tank or the like. "A pipe line, 5

a part of which is shown at 2, leads from a pump, A compressor or other source of fluid under pres-.- sure, through a plug 3 closing the top of the reduced upper. portion 01' the casing into the upper portion of the wide part of the casing where the .10 lower end of this'part 2 is threaded into a stationary plug 4 which is supported in the casing in any suitable manner such as having an annular part clamped between two sections of the casing asshown in Figure 5. The upper end oi 15 the plug is formed with a conical recess 5 ter- -minating in a tapered threaded. lower end for receiving the threaded tapered endofthe part 2 of the pipe line, the conical part 5 acting as to .facilitate the threading of the lower end-or the part 2 in' the threaded part of the plug so that the bore of the pipe part 2 will register with the bore Got the plug, the lower end of the bore 6 having a threaded enlargement for receiving. 1

the upper threaded end of the part 2 of the pipe part. .The plug is also provided with the 'ver tically arranged holes I- for' the passage of fluid upwardly through the plug. The upper portion of the-pm 2' of the pipe line'is ofiset'as shown in Fig; 5 so that the lower-portion of the part 2' will be located close to. a portion of the internal wall of the casing and the lower end ofthls part I 2" is threaded in a vertical passage 8 passing eh- I tirely through a plug 9 held stationary in the casing between two of the sections-thereof, as shown more particularly in Fig. 2. Thus plug .9 forms a receiving chamber 10 betweenitself and the plug 4. A'third plug ii is held in a. stationary manner between two of the sections of the 40 casing and this plug with the plug 9 forms a chamber I! for the working or operating piston l3. Another plug'. I4 is stationarily held in the casing between two of the lower sections thereof and this plug forms with the plug II a chainber l5 for the pumping piston. l6. A main discharge pipe I'I passes through a'vertically arranged bore in the piston l3 and-is fastened to the piston by a. screw H as shown in Fig. '7 'though if desired, this pipe ll may be formed of upper and lower sections, the adjacent ends of which are threaded in the 'boreof the piston i3.- The upper part of the pipe l'l extends intothe chamber Ill and has a cage l8 threaded to its upper extremity in which is loguiding means for the lowerend of the part 2 20 plug 9 and also a sliding close fit in a hole or bore passing through the plug II, the lower end of said pipe |1 being threaded in the upper end of the pumping piston IE to receive the liquid discharged by the pump as described in the above mentioned application.

A pair of elongated tubular valve members 33 and 34 are connected together adjacent their ends by the cross bars 35 shown more particularly in Figure 10 and these tubular valve members 33 and 34 pass slidingly through vertical bores in the piston l3 and the upper end of the tubular valve 33 has a sliding close fit in the bore 8 of the plug 9 and the upper end of the valve 34 has a sliding close fit in the vertical bore 36 in the plug 9 andlocated opposite the bore 8. The upper end of the bore 36 discharges into the chamber H]. A vertical chamber 31 is formed in.the lower part of the plug 9 and opens out through the bottom of the plug into the chamber l2 and vertically ofiset ports 38 connect the chamber 31 with intermediate parts of the bores 8 and 36. Ports 39 in the upper ends of the valves 33 and 34 are adapted to register with. these ports 38 when said valves 33 and 34 are in difl'erent positions. For instance, the port 39. of the valve 33 will register with the upper port 38 when the valves 33 and 34 are in their raised positions but the port 39 of the valve 34 will be out of register with the lower port 38 as shown in Figure '3. Then when the valves 33 and 34 are in lowered position, the port 39 of valve 33 will be out of register with its port 38 while the port 39 of the valve 6 will be in register with its port 38 as shown in Fig. 2 and as the ports 38 are in communication with the chamber 31 which in turn is in communication with the upper end of the chamber |2 of piston |3, these valves 33 and 34 will control the flow of fluid into and from the upper end of the chamber l2.

The lower ends of the valves 33 and 34 extend into vertical bores in the plug II, the lower ends of these bores being closed and a chamber 49 is formed in the plug -II and opens out through the upper end of the plug into the chamber l2 and this chamber 40 is provided with the vertical- 7 1y ofiset ports 4| controlled by the ports 42 in the lower ends of the valves 33 and 34, the ports just described being so arranged that when an upper-port of one of the valves 33 and 34 is in communication with a port '38, the port 42 of said valve is out of communication with the port 4| and when a. port 42 is in communication with the port 4|, a port 39 is out of communication with aport38asshowninFigs.2and3.

The piston I3 is formed with a centrally 'arranged vertical bore 43in which is located a spring 44 and plugs 45 close the ends of the bore 43 and have rounded heads projecting from the 4 ends of the piston l3. A rod 46 passes slidingly through each plug 45 and has a head 41 at its inner end contacting an end of the spring and each rod is so located that it will engage the cross bars 35 asthe piston l3 nears the ends of its strokes. A spring-actuated latch 48 is pivoted to each of the plugs 9 and II, a latch being shown in detail in 13 and each latch is provided with a shoulder 4| for engaging across her 35 for holding the cross bar and therefore the valves 33 the upper end of the chamber 2 so that the pisagainst movement by therod 46 by the latch 48, 5

the rod 46 is pushed inwardly so that its head will compress the spring and this action will continue until the piston reaches a position where a head of the plug 45 will engage the latch 48 and thus move it to releasing position and then the 10 energy stored in the contracted spring 44 will cause the rod 46 to press the cross bar 35 and the valve members 33 and 34 towards the plug, towards which the piston I3 is moving, and thus the valves 33 and 34 will be shifted to another 15 position.

For instance, with the parts shown in Fig. 2, the propulsion fluid from the pipe line 2 will flow through the section 2' into the bore 8 through the valve 33 and pass from the valve through the port 42 at its lower end into the port 4| and through the chamber 49 into the lower part of the chamber l2 so that the piston I3 is forced upwardly and the fluid or liquid in the chamber l2 above the piston l3 will pass therefrom through the chamber 31, right hand port 38 into the upper port 39 of valve 34 and through the bore 36 of plug 9 into the chamber H]. of course, the fluid entering the bore 8 cannot enter the upper chamber 31 as the left hand port 38 is closed as will be seen in Fig. 2. As the piston |3 nears the upper end of its stroke, the upper rod 46 will strike the upper cross piece 35 which is held against up- Fig. 3. Then the fluid in section 2' of the pipe line will enter the bore 8 and the upper part of valve 33 and as it cannot escape from the lower end of valve 33, the fluid will pass through the port 39 of valve 33, the'upper port 38 in the chamber 31 and then flow from chamber 31 into ton l3 will be moved downwardly. The fluid in the lower part of the chamber I2 will be forced by the downwardly moving piston 3 into the chamber 49 of plug l and through the right hand port 4| into the port 42 at the lower end of the valve 34 and then flows upwardly through the valve 34 and escapes from the bore 36 of plug 9 into'the chamber III. of course, the spring will be compressed as the piston l3 nears the lower end of its stroke, after which the lower latch 48 will be released by the lower plug 45 and then the valves 33 and 34 will be shifted to the position shown in Fig. 2. Thus, the piston 3 is reciprocated by the fluid flowing through the pipe line 2 and its section 2'.

As thepiston I3 is reciprocated, it will impart a reciprocatory movement to the discharge pipe l1 and as the lower end of this pipe "is connected with the pumping piston I6, then piston I5 70 from the pipe line 2 and the reciprocation of this 75 k the liquid from the well into the pipe I. The main discharge pipe I! acts as connecting means between the two pistons and the valve 2 3 permits discharge of fluid under pressure of the well directly into the discharge pipe without interfering with-the pumping action of the piston It or with said piston interfering with the discharge of the fluid under pressure.

The elongated tubular valves not only act as valves but they also serve as conduits for the fluid and the valves 33 and 34 also act in conjunction with the pipe I I as guides for the piston l3.

Another advantage of the invention is that no matter how slow it operates, it will never stop at dead center because the tubular distribution valves operate simultaneously and change positions in a snap fashion by means of the triggers and the spring means. Also by using the. proper sizes of headed plugs 45, the parts can be adjusted to operate with absolute precision.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and 'arrangement of'the several parts, provided that such changes; fall within the scope of i the appended claims.

What is claimed is:-

l. A motor of the class describedcomprising a cylinder, a. piston in the cylinder, a chamber in each end of the cylinder opening out into the cylinder and each end of the cylinder having bores therein and ports connecting the chambers with the bores, means for introducing fluid under pressure into-one bore of one end of the cylinder, the other bore of said end forming a discharge, a pair of tubular valve members connected together and in: the valve in extending through the cylinder and having their ends slidably arranged in the bores of both ends of the cylinder and controlling the ports-leading to the chambers and means operated by the piston 'ateach end of its stroke for shifting the valve members for causing the fluid to pass into alternate ends of the cylinder and to discharge from the other alternate ends.

2. A motor of the class described comprising-a cylinder having bores at its ends and a chamber in each end 0 out into the cylinder, one bore in one end acting as a discharge, means for intro- I ducing fluid under pressure into the other bore of said end, a. pair of elongated tubular valve members having theirends slidably arranged in the bores and each end having ports therein out of alignment and connecting the chambers with the bores, the ends of said valve members having ports therein for controlling the first mentioned ports, a piston slidably arranged on the valve.

members, spring-pressed rods projecting from the ends of the piston, cross pieces connecting the valve members together and engaged by the rods at the ends of the strokes of the piston for com- 25 v the cylinder adjacent the cross pieces for preventpressing the spring, latch means at the ends of ing movement of the valve members and projecstroke.

ing a cylinder, a piston in the cylinder, means for introducing compressed fluid into one end of the cylinder, said end having a discharge opening,

means including a pair of elongated tubular valve members passing through the cylinder and connected togetherfor first introducing the fluid into one end of the cylinder to force the pistonin one direction and to exhaust the opposite end of thec'ylinder and then to introduce the fluid into opposite end of the cylinder and exhaust the other end "and meanseoperated by the piston as the same nears the end of its stroke for revers- 

